'\" t
.\"     Title: \fBinnochecksum\fR
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.77.1 <http://docbook.sf.net/>
.\"      Date: 01/22/2013
.\"    Manual: MySQL Database System
.\"    Source: MySQL 5.6
.\"  Language: English
.\"
.TH "\FBINNOCHECKSUM\FR" "1" "01/22/2013" "MySQL 5\&.6" "MySQL Database System"
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.\" innochecksum
.SH "NAME"
innochecksum \- offline InnoDB file checksum utility
.SH "SYNOPSIS"
.HP \w'\fBinnochecksum\ [\fR\fB\fIoptions\fR\fR\fB]\ \fR\fB\fIfile_name\fR\fR\ 'u
\fBinnochecksum [\fR\fB\fIoptions\fR\fR\fB] \fR\fB\fIfile_name\fR\fR
.SH "DESCRIPTION"
.PP
\fBinnochecksum\fR
prints checksums for
InnoDB
files\&. This tool reads an
InnoDB
tablespace file, calculates the checksum for each page, compares the calculated checksum to the stored checksum, and reports mismatches, which indicate damaged pages\&. It was originally developed to speed up verifying the integrity of tablespace files after power outages but can also be used after file copies\&. Because checksum mismatches will cause
InnoDB
to deliberately shut down a running server, it can be preferable to use this tool rather than waiting for a server in production usage to encounter the damaged pages\&.
.PP
\fBinnochecksum\fR
cannot be used on tablespace files that the server already has open\&. For such files, you should use
CHECK TABLE
to check tables within the tablespace\&.
.PP
If checksum mismatches are found, you would normally restore the tablespace from backup or start the server and attempt to use
\fBmysqldump\fR
to make a backup of the tables within the tablespace\&.
.PP
Invoke
\fBinnochecksum\fR
like this:
.sp
.if n \{\
.RS 4
.\}
.nf
shell> \fBinnochecksum [\fR\fB\fIoptions\fR\fR\fB] \fR\fB\fIfile_name\fR\fR
.fi
.if n \{\
.RE
.\}
.PP
\fBinnochecksum\fR
supports the following options\&. For options that refer to page numbers, the numbers are zero\-based\&.
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-c\fR
.sp
Print a count of the number of pages in the file\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-d\fR
.sp
Debug mode; prints checksums for each page\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-e \fR\fB\fInum\fR\fR
.sp
End at this page number\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-p \fR\fB\fInum\fR\fR
.sp
Check only this page number\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-s \fR\fB\fInum\fR\fR
.sp
Start at this page number\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
\fB\-v\fR
.sp
Verbose mode; print a progress indicator every five seconds\&.
.RE
.SH "COPYRIGHT"
.br
.PP
Copyright \(co 1997, 2013, Oracle and/or its affiliates. All rights reserved.
.PP
This documentation is free software; you can redistribute it and/or modify it only under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License.
.PP
This documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
.PP
You should have received a copy of the GNU General Public License along with the program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see http://www.gnu.org/licenses/.
.sp
.SH "SEE ALSO"
For more information, please refer to the MySQL Reference Manual,
which may already be installed locally and which is also available
online at http://dev.mysql.com/doc/.
.SH AUTHOR
Oracle Corporation (http://dev.mysql.com/).
